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Cocomposting - a method to improve results of poultry manure composting
Year:
1999
Source of publication :
Compost Science and Utilization
Authors :
Medina, Shlomit
;
.
Raviv, Michael
;
.
Shamir, Yoav
;
.
Volume :
7
Co-Authors:
Facilitators :
From page:
70
To page:
73
(
Total pages:
4
)
Abstract:
Composting of poultry manure (initial C:N ratio - 11.3) in a thermostatically aerated pile resulted with overheating (>65 °C) and rapid loss of Total Volatile Solids (TVS) and of nitrogen. Adding five percent (on a dry weight basis) of squeezed grapefruit peels (initial C:N ratio of the mixture - 12.4) lowered the pH of the aqueous phase of the raw materials from 6.6 to 5.8 (in a 1:10 extract). This enabled controlling the pile temperature below 60 °C and increased the amount of conserved N by ca. 80 percent. Nitrogen was conserved more than the TVS on a relative basis in this mixture but conserved less than the TVS in the poultry manure alone. This suggests that previously released NH4+ was biologically immobilized in the mixture. Although the effect of the added acidic carbon source was apparent until the end of the composting period on the above mentioned parameters, a sharp rise in pH and a decline in C:N ratio occurred after less than 12 days and less than 39 days, respectively. This suggests that adding more squeezed grapefruit during the composting period may have caused additional beneficial effect on the characteristics of the end product.
Note:
Related Files :
Carbon
Composting
Manures
nitrogen
pH
Poultry manure
Show More
Related Content
More details
DOI :
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
28596
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:40
Scientific Publication
Cocomposting - a method to improve results of poultry manure composting
7
Cocomposting - a method to improve results of poultry manure composting
Composting of poultry manure (initial C:N ratio - 11.3) in a thermostatically aerated pile resulted with overheating (>65 °C) and rapid loss of Total Volatile Solids (TVS) and of nitrogen. Adding five percent (on a dry weight basis) of squeezed grapefruit peels (initial C:N ratio of the mixture - 12.4) lowered the pH of the aqueous phase of the raw materials from 6.6 to 5.8 (in a 1:10 extract). This enabled controlling the pile temperature below 60 °C and increased the amount of conserved N by ca. 80 percent. Nitrogen was conserved more than the TVS on a relative basis in this mixture but conserved less than the TVS in the poultry manure alone. This suggests that previously released NH4+ was biologically immobilized in the mixture. Although the effect of the added acidic carbon source was apparent until the end of the composting period on the above mentioned parameters, a sharp rise in pH and a decline in C:N ratio occurred after less than 12 days and less than 39 days, respectively. This suggests that adding more squeezed grapefruit during the composting period may have caused additional beneficial effect on the characteristics of the end product.
Scientific Publication
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